. The temperature can fall to –50°._____ is, 50°below freezing point.

A. Which                     B. It                     C. This                 D. That

—He hasn’t finished the work yet.  —Well, he _____.

A. ought                B. ought to           C. ought to have     D. ought to have finished

—Can I help you, sir?     —______.

A. Yes, you can help me               B. No, I don’t need any help

C. Of course, if you like                     D. No, thanks, I’m being served

After his long journey from Australia. Tom returned home, ____.

A. exhausting         B. exhausted          C. being exhausted   D. having exhausted

Jim has no idea where he lost his watch, ____ it’s ____ that he will get it back.

A. and; unlikely     B. but; impossible  C. and; possible      D. but; probably

Have you got a pen and a piece of paper? I’ll___ what you have told me.

A. make notes    B. take notes of       C. leave notes of      D. take a note

Sorry, I have no time ____ ; I can’t help you right now.

A. not have           B. contrary to        C. to give you        D. to be

. It’s not ____ I won’t do it, _____ I can’t do it.

A. what; but that                                B. because; but what

C. what; but because                               D. that; but that

I can hardly imagine such a little boy ___ across the Nile.

  A. swim   B. to swim  C. swimming  D. to have swum

Wang Hua is said ____a new computer program recently, but I don’t know when she will finish it.

  A. to design B. to be designing   C. to have been designing  D. to have designed